Mercurial > masqmail
annotate src/accept.c @ 10:26e34ae9a3e3
changed indention and line wrapping to a more consistent style
author | meillo@marmaro.de |
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date | Mon, 27 Oct 2008 16:23:10 +0100 |
parents | 08114f7dcc23 |
children | 49dab67fe461 |
rev | line source |
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0 | 1 /* MasqMail |
2 Copyright (C) 1999-2001 Oliver Kurth | |
3 | |
4 This program is free software; you can redistribute it and/or modify | |
5 it under the terms of the GNU General Public License as published by | |
6 the Free Software Foundation; either version 2 of the License, or | |
7 (at your option) any later version. | |
8 | |
9 This program is distributed in the hope that it will be useful, | |
10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 GNU General Public License for more details. | |
13 | |
14 You should have received a copy of the GNU General Public License | |
15 along with this program; if not, write to the Free Software | |
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 */ | |
18 | |
19 #include "masqmail.h" | |
20 #include "readsock.h" | |
21 | |
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22 gchar *prot_names[] = { |
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23 "local", |
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24 "bsmtp", |
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25 "smtp", |
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26 "esmtp", |
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27 "pop3", |
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28 "apop", |
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29 "(unknown)" /* should not happen, but better than crashing. */ |
0 | 30 }; |
31 | |
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32 static gchar* |
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33 string_base62(gchar * res, guint value, gchar len) |
0 | 34 { |
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35 static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; |
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36 gchar *p = res + len; |
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37 *p = 0; |
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38 while (p > res) { |
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39 *(--p) = base62_chars[value % 62]; |
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40 value /= 62; |
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41 } |
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42 return res; |
0 | 43 } |
44 | |
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45 static gint |
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46 _g_list_addr_isequal(gconstpointer a, gconstpointer b) |
0 | 47 { |
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48 address *addr1 = (address *) a; |
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49 address *addr2 = (address *) b; |
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50 int ret; |
0 | 51 |
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52 if ((ret = strcasecmp(addr1->domain, addr2->domain)) == 0) |
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53 return strcmp(addr1->local_part, addr2->local_part); |
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54 else |
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55 return ret; |
0 | 56 } |
57 | |
58 /* accept message from anywhere. | |
59 A locally originating message is indicated by msg->recieved_host == NULL | |
60 | |
61 If the flags ACC_DEL_RCPTS is set, recipients in the msg->rcpt_list is | |
62 copied and items occuring in it will be removed from the newly constructed | |
63 (from To/Cc/Bcc headers if ACC_RCPT_TO is set) rcpt_list. | |
64 */ | |
65 | |
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66 accept_error |
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67 accept_message_stream(FILE * in, message * msg, guint flags) |
0 | 68 { |
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69 gchar *line, *line1; |
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70 int line_size = MAX_DATALINE; |
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71 gboolean in_headers = TRUE; |
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72 header *hdr = NULL; |
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73 gint line_cnt = 0, data_size = 0; |
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74 |
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75 line = g_malloc(line_size); |
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76 line[0] = 0; |
0 | 77 |
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78 while (TRUE) { |
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79 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF); |
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80 |
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81 line1 = line; |
0 | 82 |
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83 if ((line[0] == '.') && (!(flags & ACC_NODOT_TERM))) { |
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84 if (line[1] == '\n') { |
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85 g_free(line); |
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86 break; |
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87 } |
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88 line1++; |
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89 } |
0 | 90 |
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91 if (len <= 0) { |
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92 if ((len == -1) && ((flags & ACC_NODOT_TERM) || (flags & ACC_NODOT_RELAX))) { |
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93 /* we got an EOF, and the last line was not terminated by a CR */ |
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94 gint len1 = strlen(line1); |
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95 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */ |
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96 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */ |
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97 line1[len1] = '\n'; |
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98 line1[len1 + 1] = 0; |
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99 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1)); |
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100 data_size += strlen(line1); |
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101 line_cnt++; |
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102 } |
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103 } |
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104 break; |
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105 } else { |
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106 g_free(line); |
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107 if (len == -1) { |
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108 return AERR_EOF; |
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109 } else if (len == -2) { |
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110 /* should not happen any more */ |
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111 return AERR_OVERFLOW; |
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112 } else if (len == -3) { |
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113 return AERR_TIMEOUT; |
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114 } else { |
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115 /* does not happen */ |
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116 DEBUG(5) debugf("read_sockline returned %d\n", len); |
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117 return AERR_UNKNOWN; |
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118 } |
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119 } |
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120 } else { |
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121 if (in_headers) { |
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122 |
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123 /* some pop servers send the 'From ' line, skip it: */ |
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124 if (msg->hdr_list == NULL) |
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125 if (strncmp(line1, "From ", 5) == 0) |
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126 continue; |
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127 |
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128 if (line1[0] == ' ' || line1[0] == '\t') { |
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129 /* continuation of 'folded' header: */ |
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130 if (hdr) { |
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131 hdr->header = |
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132 g_strconcat(hdr->header, line1, NULL); |
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133 } |
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134 |
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135 } else if (line1[0] == '\n') { |
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136 /* an empty line marks end of headers */ |
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137 in_headers = FALSE; |
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138 } else { |
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139 /* in all other cases we expect another header */ |
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140 if ((hdr = get_header(line1))) |
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141 msg->hdr_list = g_list_append(msg->hdr_list, hdr); |
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142 else { |
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143 /* if get_header() returns NULL, no header was recognized, |
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144 so this seems to be the first data line of a broken mailer |
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145 which does not send an empty line after the headers */ |
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146 in_headers = FALSE; |
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147 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1)); |
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148 } |
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149 } |
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150 } else { |
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151 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1)); |
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152 data_size += strlen(line1); |
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153 line_cnt++; |
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154 } |
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155 } |
0 | 156 } |
157 | |
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158 if (msg->data_list != NULL) |
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159 msg->data_list = g_list_reverse(msg->data_list); |
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160 else |
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161 /* make sure data list is not NULL: */ |
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162 msg->data_list = g_list_append(NULL, g_strdup("")); |
0 | 163 |
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164 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size); |
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165 /* we get here after we succesfully received the mail data */ |
0 | 166 |
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167 msg->data_size = data_size; |
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168 msg->received_time = time(NULL); |
0 | 169 |
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170 return AERR_OK; |
0 | 171 } |
172 | |
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173 accept_error |
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174 accept_message_prepare(message * msg, guint flags) |
0 | 175 { |
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176 struct passwd *passwd = NULL; |
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177 GList *non_rcpt_list = NULL; |
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178 time_t rec_time = time(NULL); |
0 | 179 |
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180 DEBUG(5) debugf("accept_message_prepare()\n"); |
0 | 181 |
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182 /* create unique message id */ |
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183 msg->uid = g_malloc(14); |
0 | 184 |
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185 string_base62(msg->uid, rec_time, 6); |
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186 msg->uid[6] = '-'; |
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187 string_base62(&(msg->uid[7]), getpid(), 3); |
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188 msg->uid[10] = '-'; |
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189 string_base62(&(msg->uid[11]), msg->transfer_id, 2); |
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190 msg->uid[13] = 0; |
0 | 191 |
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192 /* if local, get password entry */ |
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193 if (msg->received_host == NULL) { |
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194 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd)); |
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195 msg->ident = g_strdup(passwd->pw_name); |
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196 } |
0 | 197 |
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198 /* set return path if local */ |
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199 if (msg->return_path == NULL) { |
0 | 200 |
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201 if (msg->received_host == NULL) { |
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202 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name); |
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203 DEBUG(3) debugf("setting return_path for local accept: %s\n", path); |
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204 msg->return_path = create_address(path, TRUE); |
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205 g_free(path); |
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206 } |
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207 } |
0 | 208 |
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209 /* -t option */ |
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210 if (flags & ACC_DEL_RCPTS) { |
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211 non_rcpt_list = msg->rcpt_list; |
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212 msg->rcpt_list = NULL; |
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213 } |
0 | 214 |
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215 /* scan headers */ |
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216 { |
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217 gboolean has_id = FALSE; |
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218 gboolean has_date = FALSE; |
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219 gboolean has_sender = FALSE; |
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220 gboolean has_from = FALSE; |
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221 gboolean has_rcpt = FALSE; |
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222 gboolean has_to_or_cc = FALSE; |
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223 GList *hdr_node, *hdr_node_next; |
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224 header *hdr; |
0 | 225 |
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226 for (hdr_node = g_list_first(msg->hdr_list); |
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227 hdr_node != NULL; hdr_node = hdr_node_next) { |
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228 hdr_node_next = g_list_next(hdr_node); |
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229 hdr = ((header *) (hdr_node->data)); |
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230 DEBUG(5) debugf("scanning headers: %s", hdr->header); |
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231 switch (hdr->id) { |
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232 case HEAD_MESSAGE_ID: |
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233 has_id = TRUE; |
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234 break; |
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235 case HEAD_DATE: |
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236 has_date = TRUE; |
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237 break; |
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238 case HEAD_FROM: |
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239 has_from = TRUE; |
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240 break; |
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241 case HEAD_SENDER: |
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242 has_sender = TRUE; |
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243 break; |
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244 case HEAD_TO: |
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245 case HEAD_CC: |
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246 case HEAD_BCC: |
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247 has_rcpt = TRUE; |
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248 if (flags & ACC_RCPT_FROM_HEAD) { |
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249 DEBUG(5) debugf("hdr->value = %s\n", hdr->value); |
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250 if (hdr->value) { |
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251 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name); |
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252 } |
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253 } |
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254 if ((flags & ACC_DEL_BCC) && (hdr->id == HEAD_BCC)) { |
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255 DEBUG(3) debugf("removing 'Bcc' header\n"); |
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256 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node); |
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257 g_list_free_1(hdr_node); |
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258 destroy_header(hdr); |
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259 } else |
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260 has_to_or_cc = TRUE; |
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261 break; |
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262 case HEAD_ENVELOPE_TO: |
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263 if (flags & ACC_SAVE_ENVELOPE_TO) { |
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264 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n"); |
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265 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Orig-Envelope-to: %s", hdr->value)); |
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266 } |
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267 DEBUG(3) debugf("removing 'Envelope-To' header\n"); |
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268 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node); |
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269 g_list_free_1(hdr_node); |
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270 destroy_header(hdr); |
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271 break; |
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272 case HEAD_RETURN_PATH: |
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273 if (flags & ACC_MAIL_FROM_HEAD) { |
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274 /* usually POP3 accept */ |
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275 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host); |
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276 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path)); |
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277 } |
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278 DEBUG(3) debugf("removing 'Return-Path' header\n"); |
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279 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node); |
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280 g_list_free_1(hdr_node); |
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281 destroy_header(hdr); |
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282 break; |
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283 default: |
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284 break; /* make compiler happy */ |
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285 } |
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286 } |
0 | 287 |
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288 if (msg->return_path == NULL) { |
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289 /* this can happen for pop3 accept only and if no Return-path: header was given */ |
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290 GList *hdr_list; |
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291 header *hdr; |
0 | 292 |
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293 DEBUG(3) debugf("return_path == NULL\n"); |
0 | 294 |
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295 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL); |
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296 if (!hdr_list) |
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297 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL); |
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298 if (hdr_list) { |
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299 gchar *addr; |
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300 hdr = (header *) (g_list_first(hdr_list)->data); |
0 | 301 |
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302 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value); |
0 | 303 |
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304 addr = g_strdup(hdr->value); |
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305 g_strchomp(addr); |
0 | 306 |
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307 if ((msg->return_path = create_address_qualified(addr, FALSE, msg->received_host)) != NULL) { |
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308 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path)); |
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309 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Warning: return path set from %s address\n", hdr->id == HEAD_SENDER ? "Sender:" : "From:")); |
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310 } |
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311 g_free(addr); |
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312 } |
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313 if (msg->return_path == NULL) { /* no Sender: or From: or create_address_qualified failed */ |
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314 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name); |
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315 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path)); |
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316 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Warning: real return path is unkown\n")); |
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317 } |
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318 } |
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320 if (flags & ACC_DEL_RCPTS) { |
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321 GList *rcpt_node; |
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322 foreach(non_rcpt_list, rcpt_node) { |
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323 address *rcpt = (address *) (rcpt_node->data); |
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324 GList *node; |
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325 if ((node = g_list_find_custom(msg->rcpt_list, rcpt, _g_list_addr_isequal))) { |
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326 DEBUG(3) debugf("removing rcpt address %s\n", addr_string(node->data)); |
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327 msg->rcpt_list = g_list_remove_link(msg->rcpt_list, node); |
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328 destroy_address((address *) (node->data)); |
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329 g_list_free_1(node); |
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330 } |
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331 } |
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332 } |
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334 /* here we should have our recipients, fail if not: */ |
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335 if (msg->rcpt_list == NULL) { |
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336 logwrite(LOG_WARNING, "no recipients found in message\n"); |
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337 return AERR_NORCPT; |
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338 } |
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340 if (!(has_sender || has_from)) { |
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341 DEBUG(3) debugf("adding 'From' header\n"); |
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342 msg->hdr_list = g_list_append(msg->hdr_list, |
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343 msg->full_sender_name |
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344 ? |
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345 create_header(HEAD_FROM, |
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346 "From: \"%s\" <%s@%s>\n", |
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347 msg->full_sender_name, |
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348 msg->return_path->local_part, |
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349 msg->return_path-> |
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350 domain) |
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351 : |
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352 create_header(HEAD_FROM, "From: <%s@%s>\n", |
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353 msg->return_path->local_part, |
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354 msg->return_path->domain) |
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355 ); |
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356 } |
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357 if ((flags & ACC_HEAD_FROM_RCPT) && !has_rcpt) { |
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358 GList *node; |
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359 DEBUG(3) debugf("adding 'To' header(s)\n"); |
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360 for (node = g_list_first(msg->rcpt_list); node; node = g_list_next(node)) { |
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361 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: %s\n", addr_string(msg-> return_path))); |
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362 } |
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363 } |
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364 if ((flags & ACC_DEL_BCC) && !has_to_or_cc) { |
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365 /* Bcc headers have been removed, and there are no remaining rcpt headers */ |
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366 DEBUG(3) debugf("adding empty 'Bcc:' header\n"); |
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367 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_BCC, "Bcc:\n")); |
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368 } |
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369 if (!has_date) { |
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370 DEBUG(3) debugf("adding 'Date:' header\n"); |
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371 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp())); |
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372 } |
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373 if (!has_id) { |
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374 DEBUG(3) debugf("adding 'Message-ID:' header\n"); |
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375 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name)); |
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376 } |
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377 } |
0 | 378 |
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379 /* Received header: */ |
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380 /* At this point because we have to know the rcpts for the 'for' part */ |
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381 if (!(flags & ACC_NO_RECVD_HDR)) { |
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382 gchar *for_string = NULL; |
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383 header *hdr = NULL; |
0 | 384 |
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385 DEBUG(3) debugf("adding 'Received:' header\n"); |
0 | 386 |
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387 if (g_list_length(msg->rcpt_list) == 1) { |
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388 address *addr = (address *) (g_list_first(msg->rcpt_list)->data); |
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389 for_string = g_strdup_printf(" for %s", addr_string(addr)); |
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390 } |
0 | 391 |
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392 if (msg->received_host == NULL) { |
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393 hdr = create_header(HEAD_RECEIVED, |
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394 "Received: from %s by %s" |
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395 " with %s (%s %s) id %s%s;" |
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396 " %s\n", |
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397 passwd->pw_name, conf.host_name, |
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398 prot_names[msg->received_prot], |
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399 PACKAGE, VERSION, |
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400 msg->uid, for_string ? for_string : "", |
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401 rec_timestamp()); |
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402 } else { |
0 | 403 #ifdef ENABLE_IDENT |
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404 DEBUG(5) debugf("adding 'Received:' header (5)\n"); |
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405 hdr = create_header(HEAD_RECEIVED, |
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406 "Received: from %s (ident=%s) by %s" |
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407 " with %s (%s %s) id %s%s;" |
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408 " %s\n", |
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409 msg->received_host, |
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410 msg->ident ? msg->ident : "unknown", |
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411 conf.host_name, |
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412 prot_names[msg->received_prot], |
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413 PACKAGE, VERSION, |
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414 msg->uid, for_string ? for_string : "", |
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415 rec_timestamp()); |
0 | 416 #else |
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417 hdr = create_header(HEAD_RECEIVED, |
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418 "Received: from %s by %s" |
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419 " with %s (%s %s) id %s%s;" |
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420 " %s\n", |
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421 msg->received_host, |
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422 conf.host_name, |
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423 prot_names[msg->received_prot], |
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424 PACKAGE, VERSION, |
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425 msg->uid, for_string ? for_string : "", |
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426 rec_timestamp()); |
0 | 427 #endif |
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428 } |
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429 header_fold(hdr); |
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430 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr); |
0 | 431 |
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432 if (for_string) |
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433 g_free(for_string); |
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434 } |
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435 |
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436 /* write message to spool: */ |
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437 /* accept is no longer responsible for this |
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438 if(!spool_write(msg, TRUE)) |
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439 return AERR_NOSPOOL; |
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440 */ |
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441 return AERR_OK; |
0 | 442 } |
443 | |
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444 accept_error |
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445 accept_message(FILE * in, message * msg, guint flags) |
0 | 446 { |
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447 accept_error err; |
0 | 448 |
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449 err = accept_message_stream(in, msg, flags); |
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450 if (err == AERR_OK) |
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451 err = accept_message_prepare(msg, flags); |
0 | 452 |
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453 return err; |
0 | 454 } |